Symptom Related Diagnostic Procedures

Symptom: Brake noise (squealing)

Information

Symptom: Brake noise (squealing)

Information
^ The high-performance brake system is designed to achieve the best possible braking effect at all speeds and temperatures.
^ This can result in brake noises, depending on speed, braking power and ambient conditions (e.g. temperature, air humidity).
^ If a complaint (about brake noise) is received, this generally tends to occur when the vehicle is traveling slowly, just before the vehicle stops, when the brake pedal is pressed lightly.

Information on brake noise (squealing) and remedial action

Always observe the following points before carrying out remedial action in the event of complaints:

^ Carry out repairs if concrete customer complaints are received.
^ Normally, no action is required if brake noise (squealing) is heard sporadically. Refer to the Information above in this case.
^ General recommendation in the event of a complaint: Install new brake pads (current spare parts).
^ Install new brake-piston damping plates (mass balancers or claw plates), if fitted. Pay particular attention to the very important bonding (contact surfaces free of grease and dust and minimum contact pressure).
^ Only in rare cases can brake noise be eliminated by replacing other brake components (e.g. replacing brake calipers). Such costly measures should only be carried out following consultation with the importer (in warranty cases) or the customer.

Brake noise (squealing) - grey cast-iron brake discs

The remedial action is described in the tables below and depends on:

^ Vehicle type
^ Vehicle axle
^ Equipment variant: Brake system with grey cast-iron brake discs or with PCCB brake discs (Porsche Ceramic Composite Brake)